Cylinder Liners

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Liners are unevenly worn during operation and surface structure is affected by wear caused by factors such as cat-fines, cold corrosion, fuel sulphur content and the TBN of the chosen cylinder lubrication oil.

For 4-stroke engines a correct liner surface is one of the key elements in keeping the lubricating oil consumption down. For 2-stroke engines a correct round shape of the liner and small variance in the diameter between the top and the bottom of the liner reduces the movement of the piston rings and wear they cause on the ring grooves.
In both 2 and 4-stroke engines a proper liner surface is important to keep a stable oil film on the liner wall protecting it from wear and corrosion.

De-glazing restores the surface of the liner and Honing restores the shape of the liner.

Our team can do liner inspection before dry-docking to determine need for replacement or honing using our Liner Diameter Measurement (LDM) without the need to remove the cylinder covers, one liner can be measured in less than an hour. We can also measure the coating thickness on the piston rings using our Coating Thickness Measurement (CTM) device.

For the liner machining we have honing and de-glazing machines in different sizes to fit engines from 260mm – 980 mm bore engines. We also have a number of machines for special applications like Wavecut grinding machine for wavecutting of MAN Diesel 2-stroke engine liners.